mmy question is if resistor opposes current then why current before the resistor and after resistor same although it opposes current...iam very confuse someone plz answer

 

Before you install the resistor it does not oppose the flow of current. After you install the resistor is does oppose the flow of current. Therefore, the current is NOT the same before and after you install a resistor.

If a garden hose opposes the flow of water, why is the flow of water the same at both ends of the hose? Because water and current do not disappear in the middle of a resistance to flow.

 

Thanks bro

 

Creating a poll on this, makes no sense

 

I guess #12 votes 12?
Max.

 

The only way I ever won an election: run unopposed.

 

The only way I ever won an election: run unopposed.

I just voted for you; send pork.

 

I guess #12 votes 12?
Max.

Everyone knows the answer is 42 but it was not added as an option.

 

I don't like the terminology "a resistor opposes current." It literally is not correct. Kinda like the old, incorrect, adage "current takes path of least resistance."

If I've got a 1A current source across a 1 ohm resistor, is the resistance opposing the current? Seems if that were so, I'd see a drop in current which, of course, doesn't happen.

 

Semantics. Please don't pee in the soup. The beginner is having enough difficulty.

 

In fact, it would be technically more accurate, though still incorrect, to say that "resistance opposes voltage".

A resistance applied in parallel with a voltage source develops exactly an equivalent, and opposing voltage across its terminals.

 

Semantics. Please don't pee in the soup. The beginner is having enough difficulty.

When I train young dogs, I try not to develop bad habits in them that I'll have to break later.

It's easier to teach slow and correctly when they're young than to have to fix problems when they are older.

 

Assuming voltage stays the same then an increased current will return a drop in resistance and vice verse, this pretty clearly shows that resistance is central to the flow of current itself.

 

I call your semantics and raise you a tutorial.

http://forum.allaboutcircuits.com/threads/ohms-law-for-noobies-or-the-amp-hour-fallacy.69757/

 

Assuming voltage stays the same then an increased current will return a drop in resistance and vice verse, this pretty clearly shows that resistance is central to the flow of current itself.

How will increasing the current cause the resistance to drop? If the voltage is staying the same, how will you increase current in the first place?

 

Yes bro iam beginner to engg thats why iam confuse

 

A resistor opposes current in the same way that a water valve opposes water flow. It's a restriction. More power (voltage or pressure) must be supplied at the source to maintain the same flow at the output, with the excess power being dissipated at the restriction. If more power is not supplied, the flow decreases.

Just as with water, the flow on either side of the restriction is identical. No extra water mass or electrical charge is added or removed, only energy.

 

A resistor opposes current in the same way that a water valve opposes water flow. It's a restriction. More power (voltage or pressure) must be supplied at the source to maintain the same flow at the output, with the excess power being dissipated at the restriction. If more power is not supplied, the flow decreases.

Just as with water, the flow on either side of the restriction is identical. No extra water mass or electrical charge is added or removed, only energy.

I like the word "restricts" better than "opposes". "Opposes" implies "equal and opposite". And "oppose" is not a synonym for "restrict".

 

Agreed. It may just be semantics but I can see how "oppose" might imply the active use of outside force or energy, as opposed to a passive consumption of energy.

 

How will increasing the current cause the resistance to drop? If the voltage is staying the same, how will you increase current in the first place?

this is the way these things go, look at batteries, lithiums. The lower the internal resistance........what happens?

yes, the higher the current it can discharge, and the voltage will still be at the nominal level, 3.7v or whatever.

This equates to ohms law, and my original point.